Sawing machine



Get. 4, 1932. F D A 1,880,885

SAWING MACHINE Original Filed Feb. 21. 1927 4 Sheets-Sheet l @GKWwJ LFWQFm Oct. 4, 1932. F DITTMAR 1,880,885

SAWING MACHINE Original Filed'Feb. 21. 1927 4 Sheets-Sheet 2 WQ WWW Oct. 4, 1932. DITTMAR 1,880,885

SAWING MACHINE Original Filed Feb. 21. 1927 4 sh t -s t 3 duet/M1 1 3 F. DITTMAR 1,330,835

SAWING' MACHINE Original Filed Feb. 21. 1927 '4 s t s t 4 amen 01;

Patented Oct. 4, 1932 UNITED stares.

eases;

IRVIN F. DITTMAR, OF WILLIAMS PORT, PENNSYLVANIA, ASSIGNOR TO THE CROMAR 00. OF WILLIAMSPORT, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA FSAW'ING MACHINE Original application filed February 21, 1927, Serial No. 169,993. Patent No. 1,794,758, March 3, 1931.

Divided and this application filed April 2, 1930. Serial No. 441,112.

This invention relates tocertai-n new and useful improvements in sawing machines and more particularly to trim saws for cutting material at right angles to form a sqnar cut, the object being to provide a novel form of saw carriage to enable material to be fed properly and quickly to'the saw so that the proper cut will be made. a D

Another object of the invention 18 to provide novel means for mounting the table so that it is maintained in such a position that the material thereon will be forced into engagement with the cutting edge of the to form a perfect right, angle cut, the table being adjustable.

Another object of the invention is to provide novel means for limiting the movement of the table in both directions by providing a yieldable bumper in the form; of a spring which not only limits the movement of the table, but aids in returmng the same.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claim. 1

In the drawings; I I

Figure 1 is a front elevation of a sawlng machine constructed in accordance with my invention; 7 v

Figure Qis a side elevation;

Figure 3 is adetail viewof the bumper-l with the table ;7 f

Figure 4 is an enlargedvertical section, portion of the frame, track and through a carriageshowlng thermanner 'of mounting the same Figure 5 is a detail top plan view of a por tion of a carriage; V

Figurefi is an elevation of the same;

Figure 7 is a vertical section taken on line 7-7 of Figure 5;

Figure 8 is a section through the table showing the construction of the saw throat.

In the drawings 1 indicates a supporting frame on which is disposed a horizontally disposed frame 2 and while in the drawings I have shown these members formed separate, it, of course, is understood that they can be formed as a unit.

The frame 2 along each end is provided hangers;

vided with threaded bores 5 adaptedto receive bolts or screws 6 which extend through slots 7 formed in vtrack 8, which is provided with a substantially V-shaped tread portion 9., the lower edge of said track being adapted to'be engaged by a bolt 10 mounted in a threaded bore 11 of the horizontally disposed rib 4 so that the track can be adjusted up and down. As one of these means for fastening the same is arranged at each end of the track, of course, it can'be clearly understood that the track can be adjusted to any inclined position desired forthe purpose hereinafter fullydescribed. L Arranged above the frame 2 is table 12 which is provided adjacent each end with a substantially inverted U-shaped portion 13 having the legs thereof formed with oppositely disposed openings 14 inwhichare adjustably mounted cone members 15 and'lG for the balls 17 on which are mounted rolle'rs 18 having peripheral grooves corresponding in shape to the tread of the track 9 so that the table will be mounted onball bearings so as to travel back and forth freely. p 1 The cone member 16 is provided with a threadedstem 16 which works into a thread ed bore 15 of thecone member 15 so asto adjust the cone members in respect to'one an other, a set screw19 being mounted in the end of the bore 15 for preventing the same from turning after being adjusted in th "P p61positi'on; a a I After the cone members have been set in the proper positions to supportthe balls and grooved rollers, they can be locked in the hanger formed by the inverted iJ-shaped portion of the table by the set screw 20 mount- 1 ed in'the threaded bore 21 of one of the legs of the hanger as clearly shown inFigure 4:. This provides means for mounting the table on bearing grooved rollers mounted in hangers so as to protect the ball bearings from the sawdust and also provides means so that the table can be squared in respect to the sawby adjusting the cone members in'the lbbp The table is provided with a central throat 22, the top portion of which is closed by the convexed insert of Babbitt metal 23 having a slot 24 to receive the saw as will be hereinafter fully described. The insertextendsjup- Wardly beyond'the top surface ofthe table so as to slightly undercut the material, which is of especial advantage when cutting floormg .7

An adjustable gauge 25 is arrangedon the table against which the material is placed and held'while being cut as clearly shown in Fig- 2 3 The throat 22' is provided'with a depending bifurcated lug 26 which'straddles a rod 27 provided. with threaded ends mounted in threaded bores formed in bosses 28 of the frame 2, said rod being surrounded by coil springs 29 at each end carrying washers 3O at their free end which are adapted to be en 'gaged by the bifurcated lug 26,.the springs being adjusted on the rod by nuts 31 to limit the forward and backward movement of the 2 table. These'springs act as bufi'ers soas to eliminate the shock when the table has tions. 1

reached its end of movement in both direc- In practice the table is set at an incline so that after it has been forcedtowards thesaw,

spring arranged so that the bifurcated lug Mounted on'the frame 2 'isa standard 34 it will return by gravity and by having the engages the same at the end of this movement, when released the tension of the 'sprmg has a tendency to-start thetable so that the table moves back automatically.

The end of the table is provided with bifurcated portions 33 to provide means for connecting extension members, not shown,

to increase the length of the table in cutting long material such as" flooring and the like.

which extends upwardly at an angle of sixty degrees in respect to the table surfaceinwhich is adjustably mounted-the support of an electric motor 35 tothe shaft of which. ismounted a circular saw 86 enclosed in housing 37. by rmeansof which thesaw canbe adjusted and is protected by the guard so as, to prevent the operator from being injured. The particular construction of the 7 "saw and mounting is clearly described in the original application.

The'frame2 and table are of skeleton form so that a clearance is formed for the pieces ofmaterial cut off from the end of the strip 'in order to allow the same to drop into a chute and by having the throat constructedas shown, the sawdust can be readily drawn away in the usual manner.

In the operation of the sawasherein shown 7 and described which is especially adapted to the electric motor is driving the circular saw at a high rate of speed, when the strip is forced into contact with the cutting edge,

thereof he forces the table towards the saw against the force ofgravity so that when the piece of material has been cut and the table released,,it will return to its normal position. The rollers being adjustable allows the table to be adjusted andtrued so that the material on the table'will be maintained at right angles to the saw at, all times and by having a throat formed of Babbitt metal,

the throat can be removed and-a new one inserted as it'wears. f

' This is a divisional application of my application for sawing machine, filed February 21, 1927, Serial No. 169,993, Patent"No.

1,7 94,7 58, patented MarchB, 1931. -WhatIclaimis: 1% I v A sawing machine of the kind described comprising a frame a pair of inclined V- shaped tracks adjustably'mounted at each end of said frame, a table having depending.

inverted U-shaped portions, the legs thereof being provided with oppositely disposed openings, cone members adjustablymounted in said openings, means for locking-said members in adjusted position, rollers mounted on said cone members having substantially V-shaped grooves adapted to travel on thej V-shaped tracks, a circular saw'mounted on said" frame, said rollers being mountedto move laterally for] adjusting {said rollers to true said table in respect to said saw.

'In testimony whereof I hereunto aflix signature.-

joint v i 'IRVINIFL DITTMABQ be'used fortrimming the ends of flooring I where it is desired to have an exceptionally:

clean and true cut, thestrip of" material is placed on the table by the operator as v 11 

